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Ketel Marte, Diamondbacks

A career infielder, Marte is making the transition to center field where he has made two starts in his career (both came in 2015 with the Mariners). After hitting just eight homers over his first three seasons, the 25-year-old connected on 14 in 2018. On the year, he also batted .260 with 26 doubles and a major league-leading 12 triples.